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Display device

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20130003268 patent thumbnailZoom

Display device


A display device is disclosed. In one embodiment, the display device includes a display panel, a housing which houses the display panel and a frame which is disposed under the housing and comprises a first bottom portion. The first bottom portion includes a first bottom surface which is an upper surface thereof and a first base surface which is a lower surface thereof, and the frame includes a groove recessed from the first bottom surface.

Inventor: Kyu-Hyeong Cheon
USPTO Applicaton #: #20130003268 - Class: 36167901 (USPTO) - 01/03/13 - Class 361 


Inventors:

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The Patent Description & Claims data below is from USPTO Patent Application 20130003268, Display device.

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This application claims priority from Korean Patent Application No. 10-2011-0063953 filed on Jun. 29, 2011 in the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety.

BACKGROUND

1. Field

The described technology generally relates to a display device including a display panel and a housing and a frame which house the display panel.

2. Description of the Related Technology

Display devices are applied to televisions, monitors, notebooks, mobile phones, smart phones, tablet PCs, and the like to display images. Examples of display panel technologies include liquid crystal displays (LCDs), organic light-emitting diodes (OLEDs) and plasma display panels (PDPs). LCDs, OLEDs and PDPs are distinguished by the way they emit light.

A display device includes a display panel which displays an image and a housing which houses the display panel. The housing is accommodated in a frame. The frame is made of, e.g., metal to protect the display panel against external impact. Some display devices include a touch panel or a switching panel on the display panel to be used as three-dimensional (3D) displays. An external panel such as a touch panel or a switching panel may be housed in the housing and/or the frame, together with the display panel.

When an external impact is applied to the frame accomodating the display panel, the panel may be damaged.

SUMMARY

One inventive aspect is a display device structured to prevent a display panel from being damaged by external impact.

Another aspect is a display device comprising: a display panel, a housing which houses the display panel and a frame which is disposed under the housing and comprises a first bottom portion, wherein the first bottom portion comprises a first bottom surface which is an upper surface thereof and a first base surface which is a lower surface thereof, and the frame comprises a groove recessed from the first bottom surface.

Another aspect is a display device comprising: a display panel, a housing which houses the display panel and a frame which is disposed under the housing and comprises a bottom portion having one or more through holes.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view of an organic light-emitting display device according to an embodiment.

FIG. 2 is a bottom view of the organic light-emitting display device according to the embodiment of FIG. 1.

FIG. 3 is a cross-sectional view of an organic light-emitting display device according to another embodiment.

FIGS. 4 through 9 are bottom views of organic light-emitting display devices according to various embodiments.

FIGS. 10 through 13 are cross-sectional views of organic light-emitting display devices according to other embodiments.

DETAILED DESCRIPTION

Embodiments will now be described more fully hereinafter with reference to the accompanying drawings. The same reference numbers indicate the same components throughout the specification. In the attached figures, the thickness of layers and regions is exaggerated for clarity.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art relating to the disclosed embodiments. It is noted that the use of any and all examples, or exemplary terms provided herein is intended merely to better illuminate embodiments, and thus, it is not considered limiting.

FIG. 1 is a cross-sectional view of an organic light-emitting display device 1000 according to an embodiment.

Referring to FIG. 1, the organic light-emitting display device 1000 includes a display panel 200, a housing 400 which houses the display panel 200, and a frame 500 which is disposed under the housing 400.

The display panel 200 may include first and second plates 230 and 210 which face each other and an organic light-emitting element which is interposed between the first plate 230 and the second plate 210. At least one of the first and second plates 230 and 210 may be made of a transparent material, such as glass or transparent polymer resin.

A plurality of micro elements (not shown) for light emission may be situated on the first plate 230. The micro elements may include, for example, a plurality of metal wirings, a plurality of thin-film transistors (TFTs), and a plurality of metal electrodes. The metal electrodes may include a cathode electrode and an anode electrode. The above organic light-emitting element may be situated between the anode electrode and the cathode electrode. The organic light-emitting element includes an organic light-emitting layer. The anode electrode is connected to at least one TFT so as to receive a pixel voltage. A common voltage is applied to the cathode electrode.

Holes injected from the anode electrode and electrons injected from the cathode electrode combine together in the organic light-emitting layer to form excitons. The organic light-emitting element emits light due to energy generated when the excitons transit from an excited state to a ground state.

The second plate 210 faces the first plate 230 and covers the organic light-emitting element disposed on the first plate 230. The space between the first and second plates 230 and 210 may be sealed with a frit 220.

The housing 400 houses the display panel 200. The housing 400 may include a bottom portion 900 and a sidewall 410 extending upward from the bottom portion 900. In FIG. 1, the sidewall 410 extends upward from the bottom portion 900 in a direction substantially perpendicular to the bottom portion 900. The bottom portion 900 includes a bottom surface 910 which is an upper surface thereof and a base surface 930 which is a lower surface thereof. The bottom surface 910 is a surface that actually accommodates the display panel 200. The sidewall 410 limits the range in which the display panel 200 can move in a substantially horizontal direction.

The housing 400 may be made of metal such as aluminum, stainless steel, or steel, electrogalvanized, cold rolled coil (SECC). The above listed materials not only give the housing 400 a certain degree of mechanical strength but also are advantageous in dissipating heat emitted from the display panel 200 to the outside due to their high thermal conductivity. However, the material that forms the housing 400 is not limited to the above materials.

The frame 500 is disposed under the housing 400. The frame 500 may include a bottom portion 990 and a sidewall 530 extending upward from the bottom portion 990. A direction in which the sidewall 410 of the housing 400 extends may be substantially the same as a direction in which the sidewall 530 of the frame 500 extends. The sidewall 410 of the housing 400 and the sidewall 530 of the frame 500 may not be closely attached to each other. When the direction in which the sidewall 410 of the housing 400 extends is substantially the same as the direction in which a first sidewall 510 of the frame 500 extends, the sidewall 410 of the housing 400 and the first sidewall 510 of the frame 500 may be arranged substantially parallel to each other. Thus, the gap between the sidewall 410 of the housing 400 and the first sidewall 510 of the frame 500 may remain substantially constant regardless of position. The bottom portion 990 includes a lower surface and an upper surface. The lower surface of the bottom portion 990 is referred to as a base surface 970. The upper surface of the bottom portion 990 includes a bottom surface 950 and a groove 700 recessed from the bottom surface 950.

A predetermined gap exists between the base surface 970 and the bottom surface 950. The predetermined gap corresponds to a first thickness t1 of the bottom portion 990. In the embodiment of FIG. 1, the base surface 970 forms a substantially flat surface regardless of a region in which the groove 700 is formed. Since the region in which the groove 700 is formed is recessed from the bottom surface 950, a second thickness t2 between a bottom surface of the groove 700 and the base surface 970 is smaller than the first thickness t1. The base surface 970 may protrude downward along the recessed shape of the region in which the groove 700 is formed. In this case, the second thickness t2 between the bottom surface of the groove 700 and the base surface 970 may be substantially equal to or greater than the first thickness t1.

The second thickness t2 between the bottom surface of the groove 700 and the base surface 970 may be substantially zero. When the second thickness t2 is substantially zero, the bottom surface of the groove 700 is not covered with the base surface 970 of the frame 500 but is substantially completely open. This embodiment is illustrated in FIG. 13, which will be described in detail later.

When the housing 400 is placed on the bottom surface 950 of the frame 500, a housing space is defined between the base surface 930 of the housing 400 and the groove 700 of the frame 500. An impact relieving member 450 may be placed in the housing space.

The impact relieving member 450 may be at least partially attached to the base surface 930 of the housing 400. At the same time, the impact relieving member 450 may be at least partially inserted into the space within the groove 700 of the frame 500.

The impact relieving member 450 may be a polyhedral or polygonal plate. As shown in FIG. 1, the impact relieving member 450 may be shaped like, e.g., a hexahedron whose cross section is rectangular. Although not shown in the drawing, the impact relieving member 450 may also be spherical. That is, the impact relieving member 450 can have various shapes.

In the embodiment of FIG. 1, a cross section of the groove 700 includes three substantially rectangular sides. The cross section of the groove 700 can also have various shapes such as a polygon and a sphere. The cross section of the groove 700 may also have a shape corresponding to the shape of the cross section of the impact relieving member 450, for example, may have substantially the same cross-sectional profile as that of the impact relieving member 450.

The impact relieving member 450 may be made of a metal plate, for example, stainless steel. In this case, the impact relieving member 450 may be attached to the base surface 930 of the housing 400 by laser welding. An alternative to the material that forms the impact relieving member 450 may be a plastic plate. In this case, the impact relieving member 450 may be attached to the base surface 930 of the housing 400 by insert molding.

The impact relieving member 450 may be separated from inner sidewalls 702 and 704 of the groove 700 by a predetermined gap. A first shortest horizontal gap D1 or D2 between the inner sidewalls 702 and 704 of the groove 700 and the impact relieving member 450 may be smaller than a second shortest horizontal gap D3 between the first sidewall 510 of the frame 500 and the sidewall 410 of the housing 400. If the first shortest horizontal gap D1 or D2 is smaller than the second shortest horizontal gap D3, even when the frame 500 is moved in the horizontal direction by the force of external impact, the inner sidewall 702 of the groove 700 of the frame 500 catches on the impact relieving member 450 before the first sidewall 510 of the frame 500 reaches the sidewall 410 of the housing 400. Accordingly, the further movement of the frame 500 is prevented or at least suppressed. Since the direct delivery of impact from the first sidewall 510 of the frame 500 to the sidewall 410 of the housing 400 is prevented or at least suppressed, the damage to the display panel 200 housed in the housing 400 can be prevented.

FIG. 2 is a bottom view of the organic light-emitting display device 1000 according to the embodiment of FIG. 1.

Referring to FIG. 2, a plurality of grooves may be provided in the frame 500. In this case, an equal number of impact relieving members to the number of grooves may be provided, and the impact relieving members may be inserted into the grooves, respectively. At least two grooves 700 and 705 may be arranged asymmetrical to each other with respect to a center line of the frame 500. In the embodiment of FIG. 2, the grooves 700 and 705 of the same shape are located at different distances from the center line.

Since the impact relieving member 450 attached to the housing 400 is inserted into each of the grooves 700 and 705, the housing 400 and the frame 500 may be aligned with each other based on positions of the grooves 700 and 705 in the process of assembling the housing 400 and the frame 500. If the grooves 700 and 705 are arranged asymmetrical to each other as described above, the alignment direction and margin of the frame 500 and the housing 400 are determined, thus facilitating an alignment process.

FIG. 3 is a cross-sectional view of an organic light-emitting display device 1010 according to another embodiment.

Referring to FIG. 3, the organic light-emitting display device 1010 according to the current embodiment is different from the organic light-emitting display device 1000 according to the FIG. 2 embodiment in that a cross section of an impact relieving member 460 is polygonal. As described above, the shape of the impact relieving member 460 is not limited to the shape and form illustrated in the drawing. The impact relieving member 460 can have any shape and form as long as it can perform an impact relieving function. When the impact relieving member 460 has uneven portions as shown in the drawing, a shortest horizontal distance between inner sidewalls 712 and 714 of a groove 710 and the uneven portions of the impact relieving member 460 is a first shortest horizontal gap D1 or D2 between the inner sidewalls 712 and 714 of the groove 710 and the impact relieving member 460.

The first shortest horizontal gap D1 or D2 between the inner sidewalls 712 and 714 of the groove 710 and the impact relieving member 460 may be smaller than a second shortest horizontal gap D3 between a sidewall 510 of a frame 500 and a sidewall 410 of a housing 400. If the first shortest horizontal gap D1 or D2 is smaller than the second shortest horizontal gap D3, even when the frame 500 is moved in a substantially horizontal direction by the force of external impact, the inner sidewall 712 of the groove 710 of the frame 500 catches on the impact relieving member 460 before the sidewall 510 of the frame 500 reaches the sidewall 410 of the housing 400. Accordingly, the further movement of the frame 500 is prevented or at least suppressed.

FIGS. 4 through 9 are bottom views of organic light-emitting display devices 1040 through 1090 according to various embodiments.

Referring to FIG. 4, the organic light-emitting display device 1040 includes a single groove 760. The single groove 760 may be formed near an upper left corner of a frame 500. The single groove 760 may be octagonal, and its planar shape may be asymmetrical. In the embodiment of FIG. 4, the single groove 760 is located not in the center of the frame 500 but in a peripheral region of the frame 500, and its planar shape is asymmetrical.

Accordingly, the alignment direction and margin of the frame 500 and a housing are determined, thus facilitating an alignment process.

Referring to FIG. 5, the organic light-emitting display device 1050 includes two grooves 740 and 745. The grooves 740 and 745 are located at an equal distance from a center line but have different shapes. In this structure, the grooves 740 and 745 are arranged substantially asymmetrical to each other. Accordingly, the alignment direction and margin of a frame 500 and a housing are determined, thus facilitating an alignment process.

Referring to FIG. 6, the organic light-emitting display device 1060 includes two grooves 750 and 755 located at different distances L3 and L4 from a center line. Both of the two grooves 750 and 755 are rectangular. However, the groove 750 located above the center line of a frame 500 is smaller than the groove 755 located under the center line of the frame 500. In this structure, the grooves 750 and 755 are arranged substantially asymmetrical to each other. Accordingly, the alignment direction and margin of the frame 500 and a housing are determined, thus facilitating an alignment process.

Referring to FIG. 7, the organic light-emitting display device 1070 includes two grooves 765 and 770, and the grooves 765 and 770 are arranged asymmetrical to each other with respect to a center line. The groove 765 above a horizontal center line of a frame 500 is located on a right side of the frame 500, whereas the other groove 770 is located on a lower left side of the frame 500. The groove 765 located on the upper right side of the frame 500 is rectangular, and the groove 770 located on the lower left side of the frame 500 is square. In this structure, the grooves 765 and 770 are arranged substantially asymmetrical to each other. Accordingly, the alignment direction and margin of the frame 500 and a housing are determined, thus facilitating an alignment process.

Referring to FIG. 8, the organic light-emitting display device 1080 includes three grooves 780, 785 and 790. The grooves 780, 785 and 790 are arranged asymmetrical to each other with respect to a center line. The groove 780 located near an upper right corner of a frame 500 may be square, the groove 785 located on a middle left side of the frame 500 may be bar-shaped, and the other groove 790 located near a lower right corner of the frame 500 may be circular. In this structure, the grooves 780, 785 and 790 are arranged substantially asymmetrical to each other. Accordingly, the alignment direction and margin of the frame 500 and a housing are determined, thus facilitating an alignment process.

Referring to FIG. 9, the organic light-emitting display device 1090 includes four grooves 800 through 830, and the four grooves 800 through 830 may be located near edges of a frame 500, respectively. Each of the grooves 800 through 830 may be shaped like a bar which extends substantially parallel to a corresponding edge of the frame 500. This structure defines upper, lower, right and left sides of the frame 500. Accordingly, the alignment direction and margin of the frame 500 and a housing are determined, thus facilitating an alignment process.



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stats Patent Info
Application #
US 20130003268 A1
Publish Date
01/03/2013
Document #
13476939
File Date
05/21/2012
USPTO Class
36167901
Other USPTO Classes
International Class
05K7/00
Drawings
13



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